LAN9118-MT datasheet(10/109 Pages) MICROCHIP

Part #	LAN9118-MT

Description	High Performance Single-Chip 10/100 Non-PCI Ethernet Controller

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Manufacturer	MICROCHIP [Microchip Technology]

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10 / 109 page

LAN9118

DS00002266A-page 10

 2005-2016 Microchip Technology Inc.

TABLE 2-4:

SERIAL EEPROM INTERFACE SIGNALS

Pin No.

Name

Symbol

Buffer

Type

# Pins

Description

67

EEPROM Data,

GPO3, TX_EN,

TX_CLK, D32/nD16

EEDIO/GPO3/

TX_EN/TX_CLK

(D32/nD16)

I/O8

1

EEPROM Data: This bi-directional pin

can be connected to a serial

EEPROM DIO. This is optional.

General Purpose Output 3: This pin

can also function as a general

purpose output, or it can be

configured to monitor the TX_EN or

TX_CLK signals on the internal MII

port. When configured as a GPO

signal, or as a TX_EN/TX_CLK

monitor, the EECS pin is deasserted

so as to never unintentionally access

the serial EEPROM. This signal

cannot function as a general-purpose

input.

Data Bus Width Select: This signal

also functions as a configuration input

on power-up and is used to select the

host bus data width. Upon deassertion

of reset, the value of the input is

latched. When high, a 32-bit data bus

is utilized. When low, a 16-bit interface

is utilized.

68

EEPROM Chip

Select

EECS

O8

1

Serial EEPROM chip select.

69

EEPROM Clock,

GPO4 RX_DV,

RX_CLK

EECLK/GPO4/

RX_DV/RX_CLK

O8

1

EEPROM Clock: Serial EEPROM

Clock pin.

General Purpose Output 4: This pin

can also function as a general-

purpose output, or it can be

configured to monitor the RX_DV or

RX_CLK signals on the internal MII

port. When configured as a GPO

signal, or as an RX_DV/RX_CLK

monitor, the EECS pin is deasserted

so as to never unintentionally access

the serial EEPROM. This signal

cannot function as a general-purpose

input.

Note:

When the EEPROM inter-

face

is

not

used,

the

EECLK pin must be left

unconnected.

TABLE 2-5:

SYSTEM AND POWER SIGNALS

Pin No.

Name

Symbol

Buffer

Type

# Pins

Description

6

Crystal 1

XTAL1

lclk

1

External 25MHz Crystal Input.

Can also be connected to single-ended

TTL oscillator. If this method is

implemented, XTAL2 should be left

unconnected.

5

Crystal 2

XTAL2

Oclk

1

External 25MHz Crystal output.

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